Prevent Firing Signals in Qt

Question

We have a QCheckBox object, when user checks it or removes check we want to call a function so we connect our function to stateChanged ( int state )

Answer 1

In QObject derived classes, you can call blockSignals(bool) to prevent the object from emitting signals. So for example:

void customChangeState(bool checked)
{
    blockSignals(true);
    ui->checkBox->setCheckState(Qt::Checked);
    // other work
    blockSignals(false);
}

The above method would change the check state without clicked, stateChanged, or any other signals being emitted.